Draft-regulator for furnaces.



G. PARSTAD & E. PAULSEN.

DRAFT REGULATOR FOR FUENACES.

APPLICATION num Dnc. e, 191s.

UNITED STATEsrnTENT onirica.

GEORGE FARSTAD AND EMIL PAULSEN, OF NEW YORK, N. Y.

DRAFT-REGULATOR FOR FURNACES.

Application tiled December 6. 1913.

To alt whom it may concern.'

Re it known that we, Grenen FARSTAD and EMU. ,PAULsE'm both citizens of the United States, residing at New York city, in the county of New York and State of New York, have invented new and useful Improvements in Draft-Regulators for Furnaces, of which the following is a specification.

T he general objects of this invention are to eti'ect the setting of the various doors and dampers in a furnace or the like, at a predetermined time, and to provide means in a furnace which may eo-act with the usual regulators -forming part of the furnace. And to these ends the invention consists of a series of elements adapted to be connected to the several doors and dampers and further adapted to be actuated by a time-controlled weight.

()ther objects will appear and be better understood from that 'embodiment of our invention of which the following is a specilication, reference being had to the accompanying drawings forming part hereof, in Which:-

l `igure 1 is an elevational view of a usual furnace showing our invention a plied thereto. Fig. 2 is an enlarged detai view partly in section of the primary controlling member of the invention. Fig. 3 is an enlarged detail view of a secondary controlling member.

The heater a shown in the drawings is of the usual type as now used, but it is to be understood that my invention is ada table `to any form of heater including hot-air and steam boilers. The boiler a is provided with the usual' regulating device b which is common to all boilers of this type, and comprises a weighted lever o which is connected to the damper in the ash-box door d, and is ada ted to open and shut the same by the actlon of the diaphra e. The bar is also ada ted to open an shut the check-damper in the chimney of the heater, by means of the chain 1 which is connected to the lever at 2, and passin over the sheaves 3-3 'is connected to t e check-damper le; thus when the door Z is open the end 2 of the lever is raised as shown in full lines, and the check y damper is shut.

be positioned at any location near the furnace, but it is referable to mount it'on the adjacent wa such as by the `ase 5. This base may be of any My ,invention may Specification of Letters Patent. Patented Nov. 24:, 1914.

Serial No. 805,092.

convenient length and is provided with two bearings (5 arrangeifl in vertical alinement with each other. A rod 7 is adapted to slide vertically in the'bearings and 1s preferably square in cross section, so that it may not effect a rotary movement within the bearings. The rod 7 is provided at its lower end with an eyelet 8 on which is hung a weight 9, and obviously, this weight will tend to bear the rod down to the position shown in Fig. l, unless the rod is held in a supported or 11p-position. The rod 'i' is also provided at its upper end with the eyelet 1() to which is connected the chain 11; this chain passes through the sheaves 12 and 13 positioned on the ceiling, and is connected to the smoke-damper lz which is journaled in the chimney flue of the heater. Thus it will be noted that upon the rod being actuated the chain will be pulled by the rod and the damper will be turned. ositioned in the upper bearing (ll is a plugV 14 which is provided with a slotted head portion 15 and is adapted to be tted into the bearing by means of being screw-threaded as clearly shown in Fig. i2. A recess 16 is provided at a pre-determined location in the rod 7, and when the rod is raised, the plug 14 is adapted to be screw-threaded into the `bearing and to engage with the recess 16 and support the rod 1n its upper or raised position. Secured to the base 5 is a bracket or shelf 17, upon which a usual alarm-clock 18 is detachably secured by the set-screw 19. It is well-known that the key of the alarmspring in the usual alarm clock, unwinds quite rapidly when the spring is released; this feature is utilized in our invention, and we set the clock so that the handle of the key 18 is fitted into the slotted head 15 of the plug. Thus, upon the alarm-spring being released at a predetermined time, the key begins to rotate, and in doin screws the plug 14 from the bearing, thus disengaging the plug from the rod, whereupon the wei ht 9 will cause the rod to drop. It is to be undierstood, however, that the lug is suliciently long so that the tension oi) the spring will be spent before the plug is entirely withdrawn from the bearing. To reset the device, the set-screw is loosened and the clock being removed, is rewound and the time of release for the spring is determined; the rod is then raised and the plug is directed into engagement with the recess 16 as previously described. The clock is then poso, un-

sitioned with the alarm spring key inthe slot of the plug, and the clock is secured to the bracket, by the set screw 19.

Connected to the rod at a suitable location on the same, is a collar 20 which is provided with an eyelet 21 in the rear thereof, and has a vertically disposed ear 22 positioned on the front. A bar or arm 23 is pivotally secured to this ear 22, and is ada ted to be hooked to the handle of the Iireox door m, as shown in the drawings. rllhus, when the rod 7 is raised, the collar 20 and the arm 23 will be in the position shown in dotted lines, and the door of the tire-boxy will be ajar; obviously, upon the rod 7 descending. the arm 23 will push the door shut 'to the position shown in full lines. The eyelet 2l on the collar vhas connected to it a chain 24, Which passes over the sheave 25 and terminates on the latch 26. As previously described, the weight on the lever b retains the bar in the normal position shown in full lines in Fig. l, and in order to retain the lever in the tilted position shown in dotted lines, a bell-crank latch 26 is pivotally carried by a bracket 2S, suspended from the ceiling, and has one arm 26 projecting in the path oit the lever c and so retains the lever in the tilted position.

Now, when the clock releases the plug from engagement with the rod 7, and the rod drops, the latter pulls with it the chain 24, in addition to the chain l1; the chain 24 then pulls on the arm 27 of the latch, thus removing the arm 26 .from above the lever c. The weight on the lever c returns the lever to its normal horizontal position, and the lever` c' pulling the chain 4, opens the ashbon door, thus creating a draft up under the fire; the lever, in returnin to its normal position also loosens the c ain 1 and the check-damper will close by force of gravity. As before stated, upon the rod descending, the smoke-damper la is opened by the chain V11; thus when the rod descends, the ashboX door is opened, the fire-box door isv shut by the arm 23, the check-damper lc is closed by gravity owing to the relaxation of the chain l and the smoke damper h is opened by the chain 11. Therefore, it will be seen that the doors and the dampers are set so as to create a favorable draft for the renewing of the fire in the morning, after it has been banked the night before. v

It is obvious that those skilled in the art may vary the details of construction and arrangements of parts without departing from the spirit of our invention and therefore We do not wish to be limited to such features except as may be required by the claim.

What is claimed as new is:

lln a device of the class described a damper, a rod slidably mounted and operatively connected with the damper, a bearing for the rod, a screw plug mounted in the bearing and adapted to engage the rod, and a spring operated device `adapted to be positioned adjacent the bearing and having a rotatable member which is engageable with the screw plug.

ln testimony whereof We ailix our signatures in presence of two witnesses.

GEORGE FARSTAD. EMU; PAULSEN.

Witnesses:

JOHN A.. Bonnema, GEO.' H. Brama. 

